body,
div,
dl,
dt,
dd,
ul,
ol,
li,
h1,
h2,
h3,
h4,
h5,
h6,
pre,
form,
fieldset,
input,
textarea,
p,
blockquote,
th,
td {
  padding: 0;
  margin: 0;
}
html,body{
  width: 100%;
  height: 100%;
}
body {
  overflow-x: hidden;
  font-size: 12px;
  font-family: arial;
}
input,
button {
  border: 0;
  outline: 0;
}
ol,
ul,
dl {
  list-style: none;
}
img {
  border: 0;
  vertical-align: top;
}
a {
  text-decoration: none;
}
.main{
    width: 1200px;
    margin: 0 auto;
}
.clearfix::after {
  content: "";
  display: block;
  clear: both;
  font-size: 0;
  height: 0;
  visibility: hidden;
  overflow: hidden;
}